Term Name:	topopyrone B
Synonyms:	8-chloro-5,7,9-trihydroxy-2-methyl-4H-naphtho[2,3-g]chromene-4,6,11-trione
Definition:	A naphthochromene that is 4H-naphtho[2,3-g]chromene-4,6,11-trione substituted by a chloro group at position 8, hydroxy groups at positions 5, 7 and 9 and a methyl group at position 2. It is isolated from a fungal strain Phoma sp.BAUA2861 and acts as an inhibitor of the enzyme topoisomerase I.
Ontology:	ChEBI [CHEBI:66253]  ( EBI )